JJ Big Bottle 6CA7 is another welcome addition to the already extensive JJ EL34 line
offered. It has the harmonic complexity of an EL34 in the upper mids and highs
and the deep low end of a 6L6. It's as close to mixing an EL34 with a 6L6 in
one bottle as you can get. These tubes have round and natural sounding highs with thick low-mids. A favorite in Marshall amps or anywhere a thicker and rounder EL34 tone is desired.
These are a great "in-between" tube for the Peavey XXX and JSX amps as well as just about any other EL34 type amp such as Marshall, Laney and Mesa to name a few.
After a 24 hour burn in all power tubes are tested for noise and matched at multiple operating points for plate current (± one milliamp) and transconductance.